これを`main.py`にコピーします。

ライブサーバーを実行します:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

             Searching for package file structure from directories
             with <font color="#3465A4">__init__.py</font> files

nly|consoleAdmin|diagnostics] ## you can define additional policies with custom supported actions and resources policies: [] ## writeexamplepolicy policy grants creation or deletion of buckets with name ## starting with example. In addition, grants objects write permissions on buckets starting with ## example. # - name: writeexamplepolicy # statements: # - effect: Allow # this is the default # resources: # - 'arn:aws:s3:::example*/*' # actions: # - "s3:AbortMultipartUpload" # - "s3:GetObject" # -...

/// tip

先別擔心這裡提到的「容器」、Docker 或 Kubernetes 如果現在還不太懂。

我會在未來的章節進一步說明容器映像、Docker、Kubernetes 等等：[容器中的 FastAPI - Docker](docker.md)。

///

## 啟動前的前置步驟 { #previous-steps-before-starting }

很多情況下，你會希望在應用「啟動之前」先執行一些步驟。

例如，你可能想先執行「資料庫遷移」。

但在多數情況下，你會希望這些步驟只執行「一次」。

所以，你會希望用「單一行程」來執行那些「前置步驟」，在啟動應用之前完成。

   */
  Set<E> inEdges(N node);

  /**
   * Returns a live view of all edges in this network which can be traversed in the direction (if
   * any) of the edge starting from {@code node}.
   *
   * <p>In a directed network, an outgoing edge's {@link EndpointPair#source()} equals {@code node}.
   *
   * <p>In an undirected network, this is equivalent to {@link #incidentEdges(Object)}.

     */
    int getMaxRequestRetries();

    /**
     * Property {@code jcifs.smb.client.strictResourceLifecycle} (bool, default false)
     *
     * If enabled, SmbFile instances starting with their first use will hold a reference to their tree.
     * This means that trees/sessions/connections won't be idle-disconnected even if there are no other active
     * references (currently executing code, file descriptors).

    /**
     * Default constructor.
     */
    public CoordinatorHelper() {
        // Default constructor
    }

    /**
     * Initializes the coordinator by sending an initial heartbeat and starting the poll loop.
     */
    @PostConstruct
    public void init() {
        instanceId = ComponentUtil.getSystemHelper().getInstanceId();
        lastEventCheckTime = System.currentTimeMillis();

            throw new FessSystemException("DataService is null. IndexUpdater cannot proceed without a DataService instance.");
        }

        if (logger.isDebugEnabled()) {
            logger.debug("Starting indexUpdater.");
        }

        executeTime = 0;
        documentSize = 0;

        final FessConfig fessConfig = ComponentUtil.getFessConfig();

The [spec][rfc_7692] includes a sophisticated mechanism for client and server to negotiate
compression features. We strive to offer great performance in our default configuration and so we're
making compression the default for everyone starting with this release candidate.

Please be considerate of your servers and their operators as you roll out this release. Compression
saves bandwidth but it costs CPU and memory! If you run into a problem you may need to adjust or

Te contaré más sobre imágenes de contenedores, Docker, Kubernetes, etc. en un capítulo futuro: [FastAPI en Contenedores - Docker](docker.md).

///

## Pasos Previos Antes de Iniciar { #previous-steps-before-starting }

Hay muchos casos en los que quieres realizar algunos pasos **antes de iniciar** tu aplicación.

Por ejemplo, podrías querer ejecutar **migraciones de base de datos**.

/// tip | 提示

如果这些关于 **容器**、Docker 或 Kubernetes 的内容还没有多大意义，请不要担心。

我将在以后的章节中向您详细介绍容器镜像、Docker、Kubernetes 等：[容器中的 FastAPI - Docker](docker.md)。

///

## 启动之前的步骤 { #previous-steps-before-starting }

在很多情况下，您希望在**启动**应用程序之前执行一些步骤。

例如，您可能想要运行**数据库迁移**。

但在大多数情况下，您只想执行这些步骤**一次**。

因此，在启动应用程序之前，您将需要一个**单个进程**来执行这些**前面的步骤**。